I made the Flappy Bird. I used the Unity Editor and C# for coding. I want to explain What I did.

-Player Movement.
-Player Animation.
-Collision
-Parralax Ground
-Pipe for obstacle.
-Pipe Movement.
-Pipe Spawner.
-Game Manager for controlling the Game.
-UI.

https://github.com/burakTuran00/FlappyBird

To play with left click or space keyword.
*There is a mistake wity playing space keyword. It increase the score then decrease. I suggest to you play with left click.